Mitsubishi Lancer Evolution IX. Manual - part 442

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-243

Inspection Procedure 3: The Engine Warning Lamp does not Illuminate Right after the Ignition Switch 
is Turned to the "ON" Position

AK501825

6

5

4

3

2

1

12

11

10

15 16

14

13

17

20 21

19

18

9

8

7

1 2 3
4 5 6

2

3 4

5 6

7 8

9

11 12 13 14 15 16 17 18 19 20

30

21 22 23

24 25

26 27 28 29

3132 33

34 35

1

10

R

IG2

ST

LOCK

ACC

IG1

2

7.5A

6

C-211

25

C-214

Ignition switch

C-208

2

B-W

Y-R

O

Y-R

W-L

W-L

19

17

J/B

C-01

Engine-ECU

9

22

Engine warning lamp (check engine lamp) circuit

Engine warning lamp (check engine lamp)

9

17

Wire colour code
B: Black  LG: Light green  G: Green  L: Blue  W: White  Y: Yellow  SB: Sky blue  BR: Brown  O: Orange  GR: Gray
R: Red  P: Pink  V: Violet  PU: Purple

AB

C-121

(MU803784)

NOTE

*1: L.H. drive vehicles
*2: R.H. drive vehicles

*1

*2

J/C (4)
C-23

Chec

k

engine

C-124

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-244

OPERATION

• Battery voltage is applied to engine warning lamp 

of combination meter connector (terminal No. 9) 
from ignition switch.

• Engine-ECU (terminal No. 22) makes power tran-

sistor in unit be in "ON" position, and that makes 
currents go on engine warning lamp of combina-
tion meter connector (terminal No. 17).

COMMENTS ON TROUBLE SYMPTOM

• Engine-ECU turns on engine warning lamp for 5 

seconds to check for burnt-out bulb immediately 
after ignition switch is turned to ON.

• If engine warning lamp is not lit just after turning 

ignition switch to "ON" position, failure is possibly 
caused by burn-out bulb, open/short circuit or 
other faults.

PROBABLE CAUSES

• Engine warming lamp bulb burnt out

• Failed ignition switch

• Open/short circuit in engine warning lamp circuit 

or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check engine start-up.

Q: Is engine started?

YES : 

Go to Step 2 .

NO : 

Check engine-ECU power supply, engine 
control relay and ignition switch IG1 system 
(Refer to Inspection Procedure 23 

P.13A-302

).

STEP 2. Check engine warning lamp for 
burnt-out bulb.

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Replace the engine warning lamp.

STEP 3. Connector check: C-01 combination 
meter connector

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Repair or replace the connector.

AK301236

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16

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18 17

19

20

9 8 7

Harness side connector

Connector: C-01

C-01

<L. H. drive vehicles>

<R. H. drive vehicles>

C-01 

AC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-245

STEP 4. Perform voltage measurement at C-01 
combination meter connector.

• Disconnect connector, and measure at the har-

ness side.

• Ignition switch: "ON"

• Voltage between terminal No. 9 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Go to Step 5 .

AK301236

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12 11 10

15

16

14 13

21

18 17

19

20

9 8 7

Harness side connector

Connector: C-01

C-01

<L. H. drive vehicles>

<R. H. drive vehicles>

C-01 

AC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-246

STEP 5. Connector check: C-208 ignition switch 
connector

Q: Is the check result normal?

YES : 

Check intermediate connectors C-23 <L.H. 

drive vehicles> or C-214 and C-211, and 
repair if necessary. If intermediate 
connectors are normal, check and repair 
harness between C-01 (terminal No. 9) 
combination meter connector and C-208 
(terminal No. 2) ignition switch connector.

• Check power supply line for 

open/short circuit.

NO : 

Repair or replace the connector.

AK305251

1

2

3

4

5

6

Harness side connector

Connector: C-208

C-208

<L. H. drive vehicles>

<R. H. drive vehicles>

C-208

AB

AK301236

6 5 4 3 2 1

12 11 10

15

16

14 13

21

18 17

19

20

9 8 7

Harness side connector

Connector: C-01

C-01

<L. H. drive vehicles>

<R. H. drive vehicles>

C-01 

AC